Factors leading to India's Independence before June 1948:

Leadership of Mahatma Gandhi:
- Mahatma Gandhi's leadership played a crucial role in the Indian independence movement. His non-violent civil disobedience campaigns like the Salt March and Quit India Movement mobilized masses and put pressure on the British government.

World War II:
- The onset of World War II weakened the British Empire, making it difficult for them to maintain control over their colonies. The war also highlighted the need for self-governance and independence.

Failure of British policies:
- The repressive measures taken by the British government, like the Jallianwala Bagh massacre and the implementation of discriminatory laws, alienated the Indian population and fueled the independence movement.

International pressure:
- The international community, including the United States and other countries, supported India's independence movement. The Indian National Congress was able to garner international sympathy and support for their cause.

Partition and communal tensions:
- The communal tensions between Hindus and Muslims, aggravated by the partition of India in 1947, forced the British government to expedite the process of granting independence to India.

Mountbatten Plan and transfer of power:
- The Mountbatten Plan of 1947 proposed the partition of India and the transfer of power to Indian leaders. This plan paved the way for India's independence on August 15, 1947, before the initially planned date of June 1948.